In the spring of 1992, a male European Stonechat Saxicola rubicola held territory and fathered two broods close to the observatory farmhouse on the Calf of Man. In early April the bird was trapped and found to have a nematode actively living inside its eye, visible through the cornea (plate 21). The bird seemed unaffected and was retrapped in the summer, when it was found to be of a simi
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